US7448206B2 - Method and apparatus for posttreatment of an exhaust gas from an internal combustion engine - Google Patents

Method and apparatus for posttreatment of an exhaust gas from an internal combustion engine Download PDF

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US7448206B2
US7448206B2 US10/586,870 US58687004A US7448206B2 US 7448206 B2 US7448206 B2 US 7448206B2 US 58687004 A US58687004 A US 58687004A US 7448206 B2 US7448206 B2 US 7448206B2
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Prior art keywords
exhaust gas
impact plate
apparatus according
impact
spray nozzle
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Expired - Fee Related, expires
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US10/586,870
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US20070163241A1 (en
Inventor
Ulrich Meingast
Johannes Dehn
Torsten Eggert
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Robert Bosch GmbH
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Robert Bosch GmbH
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Priority to DE200410004738 priority Critical patent/DE102004004738A1/en
Priority to DE102004004738.3 priority
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to PCT/DE2004/002556 priority patent/WO2005073524A1/en
Assigned to ROBERT BOSCH GMBH reassignment ROBERT BOSCH GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DEHN, JOHANNES, EGGERT, TORSTEN, MEINGAST, ULRICH
Publication of US20070163241A1 publication Critical patent/US20070163241A1/en
Publication of US7448206B2 publication Critical patent/US7448206B2/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28Construction of catalytic reactors
    • F01N3/2892Exhaust flow directors or the like, e.g. upstream of catalytic device
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
    • B01F3/00Mixing, e.g. dispersing, emulsifying, according to the phases to be mixed
    • B01F3/04Mixing, e.g. dispersing, emulsifying, according to the phases to be mixed gases or vapours with liquids
    • B01F3/04007Introducing a liquid into a gaseous medium, e.g. preparation of aerosols
    • B01F3/04021Introducing a liquid into a gaseous medium, e.g. preparation of aerosols by spraying or atomising of the liquid
    • B01F3/04049Introducing a liquid into a gaseous medium, e.g. preparation of aerosols by spraying or atomising of the liquid using nozzles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
    • B01F5/00Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F5/02Jet mixers
    • B01F5/0268Mixing by jets impinging against a collision plate
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
    • B01F5/00Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F5/04Injector mixers, i.e. one or more components being added to a flowing main component
    • B01F5/0403Mixing conduits or tubes, i.e. conduits or tubes through which the main component is flown
    • B01F5/0471Mixing conduits or tubes, i.e. conduits or tubes through which the main component is flown the additional component being introduced at the circumference of the conduit
    • B01F5/0473Mixing conduits or tubes, i.e. conduits or tubes through which the main component is flown the additional component being introduced at the circumference of the conduit with additional mixing means other than injector mixers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/16Selection of particular materials
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066Selective catalytic reduction [SCR]
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/36Arrangements for supply of additional fuel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/20Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00Structure or shape of gas passages, pipes or tubes
    • F01N2470/24Concentric tubes or tubes being concentric to housing, e.g. telescopically assembled
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/02Adding substances to exhaust gases the substance being ammonia or urea
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/10Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
    • F01N2610/102Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance after addition to exhaust gases, e.g. by a passively or actively heated surface in the exhaust conduit
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/14Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/20Exhaust after-treatment
    • Y02T10/24Selective Catalytic Reactors for reduction in oxygen rich atmosphere

Abstract

A method of and an apparatus for posttreatment of an exhaust gas from an internal combustion engine, in which a substance to be mixed with the exhaust gas is sprayed in metered quantities into an exhaust gas line through which the exhaust gas flows. The substance is sprayed onto an impact plate disposed inside the exhaust gas line.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a 35 USC 371 application of PCT/DE 2004/002556 filed on Nov. 19, 2004.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to an improved method of and apparatus for posttreatment of an exhaust gas from an internal combustion engine.

2. Prior Art

Apparatuses, with which a substance to be mixed with the exhaust gas from an internal combustion engine is sprayed in metered quantities into an exhaust gas line through which exhaust gas flows are known for two different purposes.

First, a urea-water solution (UWS) is sprayed into the exhaust gas from diesel engines, to reduce the proportion of nitrogen oxides NOx in the exhaust gas. The urea in the sprayed-in solution is converted here in the exhaust gas line itself, or in a hydrolysis catalytic converter optionally located in the exhaust gas line, into ammonia NH3, which in a downstream SCR catalytic converter reduces the nitrogen oxides NOx, forming nitrogen N2 and water H2O. The delivery of the urea-water solution is done either with air reinforcement, through a metering pipe protruding into the exhaust gas flow, or by means of a cooled injection valve. In both cases, particularly at low exhaust gas speeds, it cannot be avoided that some of the urea-water solution will meet the wall of the exhaust gas line, which particularly at low exhaust gas or wall temperatures leads to the development of deposits of urea or urea reaction products. In these deposits, urea or urea reaction products are stored, and at a later point they can be undesirably released again, and particularly in a transient mode of operation of the engine, they can be a hindrance to an unproblematic, optimized denitrification process. Moreover, the deposits can increase the flow resistance of the exhaust gas line and thus impair the exhaust gas flow.

Second, for heating exhaust gas from internal combustion engines downstream of the engine, fuel is injected into the exhaust gas, in order to attain the exhaust gas temperatures required for regenerating a downstream NOx, catalytic converter or diesel particle filter (DPF). The fuel here is usually sprayed purposefully onto a portion of the wall of the exhaust gas line, in order to vaporize the fuel faster, because of the contact with the heated wall of the line, than would take place solely by delivery into the hot exhaust gas. However, since the exhaust gas line is more or less severely cooled, among other factors by the relative wind of the motor vehicle, it cannot always be assured that the wall temperature of the exhaust gas line will be above the boiling temperatures of the higher-molecular ingredients of the commercial fuels used.

SUMMARY AND ADVANTAGES OF THE INVENTION

The method and apparatus of the invention, offer the advantage over the prior art that the temperature of an impact plate, mounted inside the exhaust gas line, is generally higher, because of lower heat losses, than that of an adjacent wall of the exhaust gas line. This also brings about faster heating up of the substance sprayed into the exhaust gas flow as it strikes the impact plate, located in the spraying direction of the spray device, or on striking its impact face diametrically opposite the spray device.

When the method and the apparatus are used for injecting a liquid or solid reducing agent into the exhaust gas flow, it has been found that this accelerating heating up of the reducing agent and, in the case of an SCR process, the resultant faster conversion of the urea into its subsequent products, leads to a reduction in deposits in the exhaust gas line, and as a result an unwanted storage of reducing agent in such deposits is avoided, and in exhaust gas tests, in which especially in the USA and Japan many operating points are in the range of relatively low exhaust gas temperatures of <250° C., an improvement in the dynamics and conversion rates can be attained.

When the method and the apparatus are used for post-engine combustion by fuel injection into the exhaust gas, the accelerated heating up of the fuel causes faster evaporation and thus an acceleration of the exothermal oxidation of the fuel, as a result of which the exhaust gas is heated for regenerating the catalytic converter or for burning off the Diesel particle filter. For further speeding up the evaporation, it may be advantageous to apply a thin coating of a porous ceramic material, metal wool, or some other suitable material onto the impact plate, so that the surface area of the impact face can be increased.

In general terms, by means of the impact plate of the invention, the speed of conversion of material, or of a change in the aggregate state of the substance delivered into the exhaust gas flow, can be increased, which is often advantageous in the ensuing exhaust gas treatment.

In a preferred feature of the invention, it is provided that the impact plate has a low thermal capacity, so that because of its low thermal inertia, it heats up very quickly to the temperature of the exhaust gas, and that for being secured in the exhaust gas line, the impact plate is joined to the wall of that line by connecting elements with poor thermal conductivity, so that at relatively high travel speeds associated with greater cooling of the wall, because of the relative wind, only little heat is dissipated from the impact plate to the wall.

To improve the mixing of the substance, evaporating from the impact plate, with the exhaust gas flowing past the impact plate, a further advantageous feature of the invention provides that the exhaust gas is made turbulent downstream of the impact plate in terms of the flow direction, preferably by a static mixer disposed downstream of the impact face in terms of the flow direction, which increases the turbulence of the exhaust gas flow downstream of the impact face and thus assures improved mixing of the exhaust gas flow there.

To provide for secure fastening and a defined position of the impact plate in the tail pipe and relative to the spraying direction, the impact plate is preferably bent in tubular form such that it can mounted at a slight spacing from the wall of the exhaust gas line, coaxially in the exhaust gas line, and has a beveled face end, through which the substance can be sprayed from a spray nozzle, oriented at an acute angle to the flow direction of the exhaust gas, of the spray device onto an impact face located on the inside of the impact plate and diametrically opposite from the spray nozzle.

To enable economical manufacture of the apparatus, the impact plate is preferably shaped together with the connecting elements serving to secure it in the exhaust gas line and together with the static mixer, if present, that serves to make the exhaust gas turbulent, in the form of a stamped and bent part made of thin sheet metal, which to prevent corrosion may for instance comprise stainless steel.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is described in further detail below in conjunction with the drawings, in which:

FIG. 1 is a longitudinal sectional view through part of a motor vehicle tail pipe with an apparatus according to the invention;

FIG. 2, a cross-sectional view taken along the line II-II in FIG. 1;

FIG. 3, a longitudinal sectional view through part of a motor vehicle tail pipe, with a modified apparatus according to the invention;

FIG. 4, a cross-sectional view taken along the line injection valve-IV in FIG. 3;

FIG. 5, a developed view of an impact plate of the apparatus of the invention shown in FIGS. 3 and 4.

DESCRIPTION OF THE PREFERRED EMBODIMENT

FIG. 1 shows a short portion of an exhaust manifold or tail pipe 2 of a motor vehicle with a diesel engine, between the engine (not shown) and a catalytic converter 4, which is also partly shown on the right-hand side of FIG. 1, and in which nitrogen oxides NOx contained in the tail pipe exhaust gas are reduced by reacting with ammonia NH3, forming nitrogen N2 and water H2O.

For generating the ammonia that is needed for reducing the nitrogen oxides in the catalytic converter 4, a urea-water solution is sprayed, upstream in terms of the flow direction from a catalytic converter 4 in a manner known per se, through a spray nozzle 6 of a cooled injection valve or metering valve 8 into the exhaust gas flowing through the tail pipe 2. The spray nozzle 6 is retained by an adapter 10, which is inserted into the cylindrical wall of the tail pipe 2, and the nozzle is inclined to the longitudinal axis 12 of the tail pipe 2 so that a convergent spray stream or mist 14 emerging from the spray nozzle 6 enters the tail pipe 2 at an acute angle α to the flow direction (arrow S) of the exhaust gas.

To prevent the spray stream or mist 14 from striking a portion, diametrically opposite the spray nozzle 6, of the wall 16 of the tail pipe 2 that is cooled by the relative wind during travel of the motor vehicle, a thin impact plate 18 is mounted inside the tail pipe 2 directly downstream of the spray nozzle 6; with a part of its inside 20 pointing in the direction of the spray nozzle 6, it forms an impact face 22 for the droplets of the spray stream or mist 14 that reach as far as the impact plate 18.

The impact plate 18 comprises a metal sheet bent into a tube, which is inserted coaxially into the tail pipe 2 of circular cross section and which has a somewhat smaller diameter than the tail pipe 2, so that between the wall 16 of the tail pipe 2 and the outside of the impact plate 18, an annular gap 24, with a gap width of a few millimeters, remains open. For securing the impact plate 18, a plurality of spacer feet 26 of a material with poor thermal conductivity are used, spanning the annular gap 24, in order to minimize the heat dissipation from the impact plate 18, bathed by the hot exhaust gas, to the wall 16 of the tail pipe 2 that is cooled by the relative wind.

The face end 28 of the tubular impact plate 18 toward the front in terms of the flow direction, and adjacent to the spray nozzle 6, is beveled, and the longer wall portion having the impact face 22 is diametrically opposite the spray nozzle 6, so that the spray stream or mist 14 emerging from the spray nozzle 6 and passing through the beveled face end 28 of the tubular impact plate 18 strikes the impact face 22 and moistens it with the urea-water solution.

The thickness of the material comprising the impact plate 18 is relatively slight, or in other words less than the thickness of the wall 16 of the tail pipe 2, so that because of its low thermal capacity and the poor thermal conductivity of the spacer feet 26, it very quickly heats up to the temperature of the hot tail pipe gases, and unlike the externally cooled wall of the tail pipe 2, it also maintains that temperature. Thus the urea-water solution striking the impact face 22 also heats up quickly and evaporates from the impact face 22, so that even at low exhaust gas speeds and/or low exhaust gas temperatures downstream of the impact face 22, no deposits of urea or reaction products of the urea form in the tail pipe 2 or on the impact plate 18.

Because of the slight thickness of the material of the impact plate 18, incorporating the impact plate 18 does not substantially increase the flow resistance in the tail pipe 2.

To assure better mixing of the reducing agent, evaporated from the impact face 22, with the tail pipe exhaust gases, a static mixer 30, shown schematically as a guide vane in FIG. 1, can optionally be disposed downstream of the impact face 22 and assures intensive turbulence of the reducing agent together with the tail pipe exhaust gas.

FIGS. 3 through 5 show a similar impact plate 18, but it is used in post-engine heating of a tail pipe exhaust gas for the sake of regenerating an NOx storage catalytic converter or a Diesel particle filter (not shown); instead of the urea-water solution, a metered quantity of fuel is injected through the spray nozzle 6 into the tail pipe 2.

Here, the impact plate 18, on a part of its inside 20 facing toward the spray nozzle 6, is provided with a coating of metal wool 31, by which the surface area of this impact face 22, moistened by the spray stream or mist 14, is increased.

The static mixer 30 is also embodied here integrally with the impact plate 18 and comprises a part 32 of the metal sheet which protrudes, in the form of a sector 32, past the rear edge of a sheet-metal blank 34 of the impact plate 18 and is joined to the blank 34 by a thin bridge of material 36, as shown in FIG. 5, and which [part 32], after the bending of the blank 34 into a tube, is bent inward into the tube, as best seen from FIGS. 3 and 4. The part 32 of the sheet, bent over and fixed with its tip 38 on the inside 20 of the tubular impact plate 18, assures that the tail pipe exhaust gas as is made quite turbulent as it emerges from the impact plate 18 and thus assures good mixing of this exhaust gas with the fuel evaporated in it and on the hot impact face 22. The spacer feet 26 here are also formed by parts of the impact plate 18, which protrude in the form of narrow tongues past the two opposed end edges 40, 42 of the blank 34.

The foregoing relates to a preferred exemplary embodiment of the invention, it being understood that other variants and embodiments thereof are possible within the spirit and scope of the invention, the latter being defined by the appended claims.

Claims (20)

1. An apparatus for posttreatment of an exhaust gas of an internal combustion engine, comprising:
a device for metered spraying of a substance to be mixed with the exhaust gas;
an exhaust gas line through which the exhaust gas flows, the device spraying the substance to be mixed with the exhaust gas into the exhaust gas line;
an impact plate (18), disposed inside the exhaust gas line (2) in the spraying direction of the device (6,8), wherein the thickness of the material comprising the impact plate is less than a wall thickness of the exhaust gas line, such that the impact plate has a low thermal capacity in comparison to the exhaust gas line; and
at least one connection element (26) disposed between the impact plate and the wall of the exhaust gas line; wherein the thermal conductivity of the connection element (26) is low in comparison to the thermal conductivity of the exhaust gas line.
2. The apparatus according to claim 1, wherein the impact plate (18) has an impact face (22), which is diametrically opposite a spray nozzle (6) of the device (6, 8).
3. The apparatus according to claim 2, wherein the impact plate (18), at least in the region of the impact face (22), is provided with a coating (31) that increases the area content of the surface.
4. The apparatus according to claim 2, further comprising a static mixer (30) disposed downstream of the impact face (22) in terms of the flow direction.
5. The apparatus according to claim 3, further comprising a static mixer (30) disposed downstream of the impact face (22) in terms of the flow direction.
6. The apparatus according to claim 4, wherein the mixer (30) is embodied integrally with the impact plate (18) that is produced as a stamped and bent part.
7. The apparatus according to claim 5, wherein the mixer (30) is embodied integrally with the impact plate (18) that is produced as a stamped and bent part.
8. The apparatus according to claim 1, wherein the impact plate (18) is tubular.
9. The apparatus according to claim 2, wherein the impact plate (18) is tubular.
10. The apparatus according to claim 3, wherein the impact plate (18) is tubular.
11. The apparatus according to claim 4, wherein the impact plate (18) is tubular.
12. The apparatus according to claim 5, wherein the impact plate (18) is tubular.
13. The apparatus according to claim 6, wherein the impact plate (18) is tubular.
14. The apparatus according to claim 7, wherein the impact plate (18) is tubular.
15. The apparatus according to claim 8, wherein a spray nozzle (6) of the device (6, 8) is oriented at an acute angle (a) to the flow direction (S) of the exhaust gas and sprays the substance through a beveled face end (28) of the impact plate (18) onto an impact face (22) diametrically opposite the spray nozzle (6).
16. The apparatus according to claim 9, wherein a spray nozzle (6) of the device (6, 8) is oriented at an acute angle (a) to the flow direction (S) of the exhaust gas and sprays the substance through a beveled face end (28) of the impact plate (18) onto the impact face (22) diametrically opposite the spray nozzle (6).
17. The apparatus according to claim 10, wherein a spray nozzle (6) of the device (6, 8) is oriented at an acute angle (a) to the flow direction (S) of the exhaust gas and sprays the substance through a beveled face end (28) of the impact plate (18) onto the impact face (22) diametrically opposite the spray nozzle (6).
18. The apparatus according to claim 11, wherein a spray nozzle (6) of the device (6, 8) is oriented at an acute angle (a) to the flow direction (S) of the exhaust gas and sprays the substance through a beveled face end (28) of the impact plate (18) onto the impact face (22) diametrically opposite the spray nozzle (6).
19. The apparatus according to claim 12, wherein a spray nozzle (6) of the device (6, 8) is oriented at an acute angle (a) to the flow direction (S) of the exhaust gas and sprays the substance through a beveled face end (28) of the impact plate (18) onto the impact face (22) diametrically opposite the spray nozzle (6).
20. The apparatus according to claim 13, wherein a spray nozzle (6) of the device (6, 8) is oriented at an acute angle (a) to the flow direction (S) of the exhaust gas and sprays the substance through a beveled face end (28) of the impact plate (18) onto the impact face (22) diametrically opposite the spray nozzle (6).
US10/586,870 2004-01-30 2004-11-19 Method and apparatus for posttreatment of an exhaust gas from an internal combustion engine Expired - Fee Related US7448206B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE200410004738 DE102004004738A1 (en) 2004-01-30 2004-01-30 Method and device for the aftertreatment of an exhaust gas of a combustion engine
DE102004004738.3 2004-01-30
PCT/DE2004/002556 WO2005073524A1 (en) 2004-01-30 2004-11-19 Method and device for post treating waste gas of an internal combustion engine

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US20070163241A1 US20070163241A1 (en) 2007-07-19
US7448206B2 true US7448206B2 (en) 2008-11-11

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EP (1) EP1714011B1 (en)
KR (1) KR20060127926A (en)
DE (2) DE102004004738A1 (en)
WO (1) WO2005073524A1 (en)

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080022670A1 (en) * 2006-07-27 2008-01-31 Denso Corporation Exhaust gas purification apparatus
US20080041036A1 (en) * 2006-08-16 2008-02-21 Emitec Gesellschaft Fur Emissionstechnologie Mbh Method for Adding at Least One Reactant to an Exhaust Gas Stream and Device for Treating an Exhaust Gas Stream of an Internal Combustion Engine
US20080066448A1 (en) * 2006-09-11 2008-03-20 J. Eberspaecher Gmbh & Co. Kg Exhaust gas system for an internal combustion engine
US20080193353A1 (en) * 2007-02-09 2008-08-14 Sebastian Hirschberg Exhaust gas cleaning system
US20080295497A1 (en) * 2007-05-08 2008-12-04 Friedrich Boysen Gmbh & Co. Kg Device for the distribution of flowable additives in exhaust gas systems
US20090120078A1 (en) * 2006-05-16 2009-05-14 Emitec Gesellschaft Fur Emissionstechnologie Mbh Apparatus for Treating Exhaust Gas of an Internal Combustion Engine
US20090151334A1 (en) * 2007-12-14 2009-06-18 Hyundai Motor Company Apparatus for Reducing Nitrogen Oxide in Exhaust Pipe
US20100077742A1 (en) * 2008-09-30 2010-04-01 Gm Global Technology Operations Flow diffuser for an exhaust system
US20100083641A1 (en) * 2008-10-07 2010-04-08 International Engine Intellectual Property Company, Llc System and Method of LIquid Injection into a Gas Stream
US20100101222A1 (en) * 2008-10-24 2010-04-29 J. Eberspaecher Gmbh & Co. Kg Device For Introducing A Liquid Into A Gas Flow
US20100212292A1 (en) * 2007-07-24 2010-08-26 Klaus Rusch Assembly and Method for Introducing a Reducing Agent into the Exhaust Pipe of an Exhaust System of an Internal Combustion Engine
US20100212301A1 (en) * 2008-12-17 2010-08-26 Korneel De Rudder Flow Device for an Exhaust System
US20110067381A1 (en) * 2009-09-22 2011-03-24 Ford Global Technologies, Llc Method for NOx Reduction
US20110146254A1 (en) * 2009-12-21 2011-06-23 Caterpillar Inc. Scr reductant mixer
US20110167810A1 (en) * 2010-01-12 2011-07-14 Lebas Jerome Flow device for exhaust treatment system
US20110192150A1 (en) * 2007-09-21 2011-08-11 Toyota Jidosha Kabushiki Kaisha Exhaust gas purification apparatus for internal combustion engine
US20110239631A1 (en) * 2010-04-05 2011-10-06 Caterpillar Inc. Ring Reductant Mixer
US20120047882A1 (en) * 2010-08-27 2012-03-01 Toyota Jidosha Kabushiki Kaisha Exhaust gas purification apparatus
US20120073272A1 (en) * 2009-06-18 2012-03-29 Michel Vanvolsem Mixing system in an exhaust gas mixing chamber
US20120144812A1 (en) * 2010-12-09 2012-06-14 Kia Motors Corporation Dosing module for exhaust post treatment system of vehicle
US20120216513A1 (en) * 2009-06-19 2012-08-30 Frederic Greber Exhaust line with injection system
CN103069119A (en) * 2010-08-18 2013-04-24 排放技术有限公司 Compact exhaust gas treatment unit having reaction agent addition
CN103168155A (en) * 2010-10-22 2013-06-19 斯堪尼亚商用车有限公司 Arrangement for introducing a liquid medium into exhaust gases from a combustion engine
WO2014051605A1 (en) * 2012-09-28 2014-04-03 Faurecia Emissions Control Technologies Exhaust system mixer with impactor
US8793978B2 (en) 2011-02-04 2014-08-05 Caterpillar Inc. Exhaust system having thermally conductive dosing channel
US20140286832A1 (en) * 2014-06-06 2014-09-25 Caterpillar Inc. Exhaust system
US8915064B2 (en) 2007-05-15 2014-12-23 Donaldson Company, Inc. Exhaust gas flow device
US8938954B2 (en) 2012-04-19 2015-01-27 Donaldson Company, Inc. Integrated exhaust treatment device having compact configuration
US20150152766A1 (en) * 2013-12-03 2015-06-04 Faurecia Systemes D'echappement Injection device for a reducing agent and corresponding exhaust line
US20150361853A1 (en) * 2013-01-25 2015-12-17 Futaba Industrial Co., Ltd. Exhaust gas purification device
US20160138454A1 (en) * 2013-07-25 2016-05-19 Faurecia Emissions Control Technologies, Usa, Llc Mixer with swirl box for a vehicle exhaust system
US20160319724A1 (en) * 2015-04-30 2016-11-03 Faurecia Emissions Control Technologies, Usa, Llc Mixer with integrated doser cone
US9528415B2 (en) 2014-01-31 2016-12-27 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US9616396B2 (en) 2015-05-11 2017-04-11 Cummins Emission Solutions, Inc. Mixing assembly for reducing exhaust reductant deposits
US9670811B2 (en) 2010-06-22 2017-06-06 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US9707525B2 (en) 2013-02-15 2017-07-18 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US9726064B2 (en) 2015-04-30 2017-08-08 Faurecia Emissions Control Technologies, Usa, Llc Mixer for use in a vehicle exhaust system
US10245564B2 (en) 2017-07-14 2019-04-02 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment

Families Citing this family (69)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7021047B2 (en) * 2004-07-23 2006-04-04 General Motors Corporation Diesel exhaust aftertreatment device regeneration system
SE528119C2 (en) * 2004-08-06 2006-09-05 Scania Cv Ab Arrangement for supplying a medium to an exhaust line of a combustion engine
ITMI20050653A1 (en) * 2005-04-15 2006-10-16 Iveco Spa Mixing module for a fluid in a gas stream
DE102006003786A1 (en) * 2005-09-26 2007-04-05 Faurecia Abgastechnik Gmbh Exhaust gas system for internal combustion engine of motor vehicle, has swirl cylinder for swirling of exhaust gas stream in injection area of reducing agent and arranged upstream of injection nozzle in exhaust gas pipe
FR2897642B1 (en) * 2006-02-20 2011-02-11 Renault Sas Method and device regeneration of particle filter of the exhaust of an internal combustion engine
FR2897645A3 (en) * 2006-02-20 2007-08-24 Renault Sas Particle filter regenerating method for exhaust line, involves subjecting exhaust gas to movement for making richness of fuel and exhaust gas mixture to be uniform, before its entry into oxidation catalyzer
DE102006019052A1 (en) * 2006-04-25 2007-10-31 Robert Bosch Gmbh Fitment for mounting in an exhaust line
FR2903731A1 (en) * 2006-07-12 2008-01-18 Renault Sas Exhaust line for internal combustion engine of motor vehicle, has liquid injector provided between engine and gas processing system, and helical surface irregularities provided on part of inner wall and placed on liquid path in line
FR2906306B1 (en) * 2006-09-21 2008-12-12 Renault Sas Arrangement for the depollution of a combustion engine having a duct provided with a projecting element
FR2906300B1 (en) * 2006-09-21 2011-12-16 Renault Sas Exhaust conduit comprising means for injecting a reducing agent and heating means for evaporating the liquid reducing agent
WO2008034981A1 (en) * 2006-09-21 2008-03-27 Renault S.A.S Arrangement for the pollution control of a motor vehicle internal combustion engine
FR2906305B1 (en) * 2006-09-21 2008-12-12 Renault Sas Arrangement for the depollution of a heat engine of a motor vehicle comprising a plate
FR2906303B1 (en) * 2006-09-21 2008-12-12 Renault Sas Arrangement for the depollution of an engine motor vehicle provided with a plate bent evaporation
FR2906838B1 (en) * 2006-10-09 2013-03-29 Renault Sas The exhaust line provided with a fuel injector and homogenizing exhaust gas means.
FR2910532A1 (en) * 2006-12-21 2008-06-27 Renault Sas Heat engine depollution arrangement for motor vehicle, has flap inclined towards downstream in operating position to improve vaporization of reducing agent by respectively creating depression near active surface and turbulences in mixture
FR2910533A1 (en) * 2006-12-21 2008-06-27 Renault Sas Exhaust gas' depollution system regenerating device for motor vehicle, has accumulator units restituting absorbed heat during exothermal reaction when temperature is reduced due to cooling by vaporization of liquid reducing agent
EP1982756A1 (en) 2007-04-19 2008-10-22 Magneti Marelli Sistemi di Scarico S.p.a. An exhaust system of an internal combustion engine
DE102007019999A1 (en) * 2007-04-27 2008-10-30 Arvinmeritor Emissions Technologies Gmbh Evaporator unit for introducing an oxidizable substance in the gas flow of an exhaust pipe
FR2920471B1 (en) * 2007-08-28 2009-12-04 Renault Sas A post-treatment of exhaust gas
DE102007048560A1 (en) * 2007-10-09 2009-04-23 Audi Ag Device for the aftertreatment of exhaust gases of a lean-burn-capable internal combustion engine
DE102007055192A1 (en) 2007-11-19 2009-05-20 Robert Bosch Gmbh Electromagnetic injection valve for internal-combustion engine e.g. diesel engine, has rigid liner with through-hole that is coaxial to orifice of extremely thin orifice foil, where through-hole has diameter large than that of orifice
DE102007057837A1 (en) 2007-11-30 2009-06-04 Bayerische Motoren Werke Aktiengesellschaft Device for admixing a reducing agent into an exhaust stream of an internal combustion engine
EP2075428B1 (en) * 2007-12-25 2011-11-16 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Emission control system
US20100129597A1 (en) * 2007-12-28 2010-05-27 Hansen Robert A Ultra-Resilient Fabric
DE102008008564A1 (en) 2008-02-08 2009-08-13 Robert Bosch Gmbh Metering device for reducing pollutants in exhaust gases
DE102008008563A1 (en) 2008-02-08 2009-08-13 Robert Bosch Gmbh Metering device for inserting pollutant-decreasing medium in exhaust gas system of internal-combustion engine by flow pipe, has metering module for metering pollutant-decreasing medium
EP2098697B2 (en) 2008-02-12 2015-05-20 Magneti Marelli S.p.A. Exhaust system of an internal combustion engine
DE102008009650A1 (en) 2008-02-18 2009-08-27 Robert Bosch Gmbh Dosing device for dosing e.g. urea water solution into exhaust gas in diesel engine of motor vehicle, has turn-off device equipped to partly empty dosing module and/or supply system by energy during loss of power supply of dosing device
DE102008010105A1 (en) 2008-02-20 2009-08-27 Robert Bosch Gmbh Metering system with improved anti-icing
DE102008011464A1 (en) 2008-02-27 2009-09-03 Robert Bosch Gmbh Aftertreatment system with improved heating concept
FR2928687B1 (en) * 2008-03-12 2013-07-26 Faurecia Sys Echappement Line Exhaust with reagent injector
DE102008015599A1 (en) 2008-03-26 2009-10-01 Robert Bosch Gmbh Fluid tank for receiving pollutant reducing fluid medium for reducing pollutants in exhaust gases, comprises defrosting device, which is provided for defrosting frozen pollutant reducing fluid medium
DE102008001101A1 (en) 2008-04-10 2009-10-15 Robert Bosch Gmbh Device for post-treating exhaust gas in exhaust system of internal combustion engine, includes equipment for metering reducing agent in exhaust system with selective catalytic reduction catalyst
DE102008001280A1 (en) 2008-04-21 2009-10-22 Robert Bosch Gmbh Dosing device for introducing e.g. reducing agent into exhaust gas of internal-combustion engine in automobile, has heating device partially supplying heat to supply system and/or dosing module and comprising surface heating system
US7976788B2 (en) * 2008-10-16 2011-07-12 Cummins Filtration Ip, Inc. Detachable decomposition reactor with an integral mixer
US8079211B2 (en) * 2008-11-06 2011-12-20 Ford Global Technologies, Llc Bypass purge for protecting against formation of reductant deposits
WO2010056793A1 (en) 2008-11-13 2010-05-20 Donaldson Company, Inc. Injector mounting configuration for an exhaust treatment system
DE102008059602A1 (en) * 2008-11-28 2010-06-02 Bayerische Motoren Werke Aktiengesellschaft Device for mixing reducing agent in exhaust gas stream of internal combustion engine, has exhaust line and dosing unit with opening for supplying reducing agent in exhaust line
DE102008054623A1 (en) 2008-12-15 2010-06-17 Robert Bosch Gmbh Storage container for use in system for inserting pollutant-decreasing medium in exhaust gas, has container wall and container interior space, where container interior space is arranged in order to adjust supply of medium
US8114364B2 (en) * 2009-02-02 2012-02-14 Cummins Filtration Ip, Inc. Increased reductant decomposition reactor robustness through the use of a hydrolytic catalyst coating
DE102009000918A1 (en) 2009-02-17 2010-08-19 Robert Bosch Gmbh Exhaust-gas aftertreatment arrangement for self-igniting internal-combustion engine i.e. self-igniting internal-combustion engine, has insertion unit for insertion of aid into exhaust pipe by another exhaust pipe
FR2942500B1 (en) * 2009-02-23 2011-04-08 Peugeot Citroen Automobiles Sa injection system and of an additive mixture in an exhaust manifold.
DE102009019676A1 (en) * 2009-04-30 2010-11-04 Bayerische Motoren Werke Aktiengesellschaft Device for selective catalytic nitrogen oxide reduction in oxygen-containing exhaust gas of six-cylinder diesel engine of vehicle, has insertion device bringing agent into gas line such that agent is uniformly distributed in gas
KR100924591B1 (en) * 2009-07-08 2009-10-30 한국기계연구원 Emission purification system using solid urea and selective catalytic reduction catalyst
US20110030343A1 (en) * 2009-08-06 2011-02-10 Caterpillar Inc. Scr reductant deposit removal
DE102009041345A1 (en) * 2009-09-15 2011-04-21 Mtu Friedrichshafen Gmbh System for introducing diesel on exhaust gas flowing through exhaust gas system of diesel operated internal combustion engine, has exhaust gas system provided with bypass, where additive flows from exhaust gas with certain flow rate
US8683790B2 (en) * 2009-11-10 2014-04-01 GM Global Technology Operations LLC Nozzle diffuser mixer
DE102010025611A1 (en) * 2010-06-30 2011-01-13 Daimler Ag Exhaust gas system for passenger car, has injector angularly ending at axial direction of inner pipe that is arranged in region of corrugated pipe, and mixing device arranged at inner pipe for mixing reducing agent with exhaust gas
WO2012011148A1 (en) * 2010-07-21 2012-01-26 トヨタ自動車株式会社 Exhaust gas purification device for internal combustion engine
FR2966512A1 (en) * 2010-10-21 2012-04-27 Coutier Moulage Gen Ind Device for introducing a liquid additive in a heat engine exhaust line
DE102010056314A1 (en) * 2010-12-27 2012-06-28 Friedrich Boysen Gmbh & Co. Kg An apparatus for distributing fluids in exhaust systems
DE102011018770A1 (en) * 2011-04-27 2012-11-15 Daimler Ag Exhaust system for a motor vehicle and method for operating an exhaust system
CN102489196A (en) * 2011-12-16 2012-06-13 无锡威孚力达催化净化器有限责任公司 Flow guide atomizing mixer
GB2512262B (en) * 2012-01-25 2018-05-16 Cummins Ip Inc Apparatus for facilitating reductant decomposition and mixing
DE102012216676A1 (en) 2012-09-18 2014-03-20 Robert Bosch Gmbh Exhaust aftertreatment device for internal combustion engine, has baffle plate comprising jet impact surface that impinges liquid upon actuation of injection valve, where surface tapers in flow direction of exhaust gas in exhaust passage
CN103867265A (en) * 2012-12-14 2014-06-18 福特汽车萨纳伊股份有限公司 Mixer system
SE536832C2 (en) * 2012-12-21 2014-09-23 Scania Cv Ab Arrangement for introducing a liquid medium in exhaust gas from an internal combustion engine
US9341097B2 (en) 2013-03-15 2016-05-17 Cummins Inc. Reductant material deposit reduction in exhaust aftertreatment systems
DE102013205594A1 (en) 2013-03-28 2014-10-02 Osram Opto Semiconductors Gmbh Laser device and method for its preparation
DE102013210955A1 (en) 2013-06-12 2014-12-18 Robert Bosch Gmbh Apparatus for the aftertreatment of an exhaust gas of an internal combustion engine
FR3010137B1 (en) * 2013-08-30 2016-08-26 Faurecia Systemes D'echappement A device for purifying engine exhaust gas at internal combustion
CN106414931A (en) 2014-06-03 2017-02-15 佛吉亚排放控制技术美国有限公司 Mixer and doser cone assembly
DE102014112651A1 (en) * 2014-09-03 2016-03-03 Friedrich Boysen Gmbh & Co. Kg Exhaust system of an internal combustion engine
US9719397B2 (en) 2015-04-30 2017-08-01 Faurecia Emissions Control Technologies Usa, Llc Mixer with integrated doser cone
ITUB20153526A1 (en) 2015-09-10 2017-03-10 Magneti Marelli Spa the exhaust gas treatment device for an exhaust system of an internal combustion engine
DE102016213417A1 (en) 2016-07-22 2018-01-25 Robert Bosch Gmbh Device for mixing
KR101717603B1 (en) * 2016-11-25 2017-04-05 주식회사 에코닉스 MIXER OF SCR APPARATUS FOR REDUCING NOx EMISSIONS
WO2018192663A1 (en) 2017-04-20 2018-10-25 Volvo Penta Corporation A mixer device, a use thereof and a method for mixing
WO2019042528A1 (en) 2017-08-29 2019-03-07 Robert Bosch Gmbh Device for mixing

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2384206A1 (en) 1977-03-16 1978-10-13 Suaton Michel Fuel burner turbulence inducer - has turbine forming diffuser driven in opposite direction to fuel particles by part of flow from mixing chamber
US4955183A (en) * 1988-03-09 1990-09-11 Webasto Ag Fahrzeugtechnik Burner for difficult to combust gas mixtures
US5038562A (en) * 1988-08-19 1991-08-13 Webasto Ag Fahrgeutechnik Burner for regeneration of a particle filter device
EP0555746A1 (en) 1992-02-10 1993-08-18 Man Nutzfahrzeuge Ag Device for catalytic NOx reduction
DE19934413A1 (en) 1999-07-22 2001-01-25 Siemens Ag Apparatus for introducing an additive into an exhaust gas in the exhaust gas line of a diesel engine comprises a nozzle and mixers which are combined to form a constructive and functional component
US6449947B1 (en) * 2001-10-17 2002-09-17 Fleetguard, Inc. Low pressure injection and turbulent mixing in selective catalytic reduction system
US6539708B1 (en) * 1998-02-16 2003-04-01 Siemens Aktiengesellscahft Metering system
DE10131803A1 (en) 2001-06-30 2003-05-28 Bosch Gmbh Robert Mixing device for an exhaust gas cleaning system
US6601385B2 (en) * 2001-10-17 2003-08-05 Fleetguard, Inc. Impactor for selective catalytic reduction system
US7021047B2 (en) * 2004-07-23 2006-04-04 General Motors Corporation Diesel exhaust aftertreatment device regeneration system
US7065958B2 (en) * 2002-05-07 2006-06-27 Extengine Transport Systems Emission control system

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2384206A1 (en) 1977-03-16 1978-10-13 Suaton Michel Fuel burner turbulence inducer - has turbine forming diffuser driven in opposite direction to fuel particles by part of flow from mixing chamber
US4955183A (en) * 1988-03-09 1990-09-11 Webasto Ag Fahrzeugtechnik Burner for difficult to combust gas mixtures
US5038562A (en) * 1988-08-19 1991-08-13 Webasto Ag Fahrgeutechnik Burner for regeneration of a particle filter device
EP0555746A1 (en) 1992-02-10 1993-08-18 Man Nutzfahrzeuge Ag Device for catalytic NOx reduction
US6539708B1 (en) * 1998-02-16 2003-04-01 Siemens Aktiengesellscahft Metering system
DE19934413A1 (en) 1999-07-22 2001-01-25 Siemens Ag Apparatus for introducing an additive into an exhaust gas in the exhaust gas line of a diesel engine comprises a nozzle and mixers which are combined to form a constructive and functional component
US20020162322A1 (en) 1999-07-22 2002-11-07 Ingo Ganzmann Device for introducing an additive into an exhaust gas
DE10131803A1 (en) 2001-06-30 2003-05-28 Bosch Gmbh Robert Mixing device for an exhaust gas cleaning system
US20040237511A1 (en) 2001-06-30 2004-12-02 Wolfgang Ripper Mixing device for an exhaust gas purification system
US6449947B1 (en) * 2001-10-17 2002-09-17 Fleetguard, Inc. Low pressure injection and turbulent mixing in selective catalytic reduction system
US6601385B2 (en) * 2001-10-17 2003-08-05 Fleetguard, Inc. Impactor for selective catalytic reduction system
US7065958B2 (en) * 2002-05-07 2006-06-27 Extengine Transport Systems Emission control system
US7021047B2 (en) * 2004-07-23 2006-04-04 General Motors Corporation Diesel exhaust aftertreatment device regeneration system

Cited By (65)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090120078A1 (en) * 2006-05-16 2009-05-14 Emitec Gesellschaft Fur Emissionstechnologie Mbh Apparatus for Treating Exhaust Gas of an Internal Combustion Engine
US20080022670A1 (en) * 2006-07-27 2008-01-31 Denso Corporation Exhaust gas purification apparatus
US7882697B2 (en) * 2006-07-27 2011-02-08 Denso Corporation Exhaust gas purification apparatus
US20080041036A1 (en) * 2006-08-16 2008-02-21 Emitec Gesellschaft Fur Emissionstechnologie Mbh Method for Adding at Least One Reactant to an Exhaust Gas Stream and Device for Treating an Exhaust Gas Stream of an Internal Combustion Engine
US7849676B2 (en) * 2006-08-18 2010-12-14 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Method for adding at least one reactant to an exhaust gas stream and device for treating an exhaust gas stream of an internal combustion engine
US7975472B2 (en) * 2006-09-11 2011-07-12 J. Eberspaecher Gmbh & Co. Kg Exhaust gas system for an internal combustion engine
US20080066448A1 (en) * 2006-09-11 2008-03-20 J. Eberspaecher Gmbh & Co. Kg Exhaust gas system for an internal combustion engine
US20080193353A1 (en) * 2007-02-09 2008-08-14 Sebastian Hirschberg Exhaust gas cleaning system
US20080295497A1 (en) * 2007-05-08 2008-12-04 Friedrich Boysen Gmbh & Co. Kg Device for the distribution of flowable additives in exhaust gas systems
US8615984B2 (en) * 2007-05-08 2013-12-31 Friedrich Boysen Gmbh & Co. Kg Device for the distribution of flowable additives in exhaust gas systems
US8915064B2 (en) 2007-05-15 2014-12-23 Donaldson Company, Inc. Exhaust gas flow device
US9664081B2 (en) 2007-07-24 2017-05-30 Faurecia Emissions Control Technologies, Germany Gmbh Assembly and method for introducing a reducing agent into the exhaust pipe of an exhaust system of an internal combustion engine
US20100212292A1 (en) * 2007-07-24 2010-08-26 Klaus Rusch Assembly and Method for Introducing a Reducing Agent into the Exhaust Pipe of an Exhaust System of an Internal Combustion Engine
US8333064B2 (en) * 2007-09-21 2012-12-18 Toyota Jidosha Kabushiki Kaisha Exhaust gas purification apparatus for internal combustion engine
US20110192150A1 (en) * 2007-09-21 2011-08-11 Toyota Jidosha Kabushiki Kaisha Exhaust gas purification apparatus for internal combustion engine
US20090151334A1 (en) * 2007-12-14 2009-06-18 Hyundai Motor Company Apparatus for Reducing Nitrogen Oxide in Exhaust Pipe
US8336295B2 (en) * 2007-12-14 2012-12-25 Hyundai Motor Company Apparatus for reducing nitrogen oxide in exhaust pipe
US20100077742A1 (en) * 2008-09-30 2010-04-01 Gm Global Technology Operations Flow diffuser for an exhaust system
US20100083641A1 (en) * 2008-10-07 2010-04-08 International Engine Intellectual Property Company, Llc System and Method of LIquid Injection into a Gas Stream
US20100101222A1 (en) * 2008-10-24 2010-04-29 J. Eberspaecher Gmbh & Co. Kg Device For Introducing A Liquid Into A Gas Flow
US8302383B2 (en) * 2008-10-24 2012-11-06 J. Eberspaecher Gmbh & Co. Kg Device for introducing a liquid into a gas flow
US9180407B2 (en) 2008-12-17 2015-11-10 Donaldson Company, Inc. Flow device for an exhaust system
US9925502B2 (en) 2008-12-17 2018-03-27 Donaldson Company, Inc. Flow device for an exhaust system
US20100212301A1 (en) * 2008-12-17 2010-08-26 Korneel De Rudder Flow Device for an Exhaust System
US8499548B2 (en) 2008-12-17 2013-08-06 Donaldson Company, Inc. Flow device for an exhaust system
US8646258B2 (en) * 2009-06-18 2014-02-11 Renault Trucks Mixing system in an exhaust gas mixing chamber
US20120073272A1 (en) * 2009-06-18 2012-03-29 Michel Vanvolsem Mixing system in an exhaust gas mixing chamber
US20120216513A1 (en) * 2009-06-19 2012-08-30 Frederic Greber Exhaust line with injection system
US8661792B2 (en) * 2009-06-19 2014-03-04 Faurecia Systemes D'echappement Exhaust line with injection system
US20110067381A1 (en) * 2009-09-22 2011-03-24 Ford Global Technologies, Llc Method for NOx Reduction
US9441516B2 (en) 2009-09-22 2016-09-13 Ford Global Technologies, Llc Method for NOx reduction
US8359832B2 (en) 2009-12-21 2013-01-29 Caterpillar Inc. SCR reductant mixer
US20110146254A1 (en) * 2009-12-21 2011-06-23 Caterpillar Inc. Scr reductant mixer
US8539761B2 (en) 2010-01-12 2013-09-24 Donaldson Company, Inc. Flow device for exhaust treatment system
US9810126B2 (en) 2010-01-12 2017-11-07 Donaldson Company, Inc. Flow device for exhaust treatment system
US20110167810A1 (en) * 2010-01-12 2011-07-14 Lebas Jerome Flow device for exhaust treatment system
US20110239631A1 (en) * 2010-04-05 2011-10-06 Caterpillar Inc. Ring Reductant Mixer
US9670811B2 (en) 2010-06-22 2017-06-06 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US8978366B2 (en) 2010-08-18 2015-03-17 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Compact exhaust gas treatment unit with reaction agent addition and motor vehicle having an exhaust gas treatment unit
CN103069119A (en) * 2010-08-18 2013-04-24 排放技术有限公司 Compact exhaust gas treatment unit having reaction agent addition
CN103069119B (en) * 2010-08-18 2016-06-08 排放技术有限公司 Having a compact exhaust gas processing agent is added to the reaction unit
US20120047882A1 (en) * 2010-08-27 2012-03-01 Toyota Jidosha Kabushiki Kaisha Exhaust gas purification apparatus
CN103168155B (en) * 2010-10-22 2015-07-08 斯堪尼亚商用车有限公司 Arrangement for introducing a liquid medium into exhaust gases from a combustion engine
CN103168155A (en) * 2010-10-22 2013-06-19 斯堪尼亚商用车有限公司 Arrangement for introducing a liquid medium into exhaust gases from a combustion engine
US20120144812A1 (en) * 2010-12-09 2012-06-14 Kia Motors Corporation Dosing module for exhaust post treatment system of vehicle
US8793978B2 (en) 2011-02-04 2014-08-05 Caterpillar Inc. Exhaust system having thermally conductive dosing channel
US9598999B2 (en) 2012-04-19 2017-03-21 Donaldson Company, Inc. Integrated exhaust treatment device having compact configuration
US9458750B2 (en) 2012-04-19 2016-10-04 Donaldson Company, Inc. Integrated exhaust treatment device having compact configuration
US8938954B2 (en) 2012-04-19 2015-01-27 Donaldson Company, Inc. Integrated exhaust treatment device having compact configuration
US9581067B2 (en) * 2012-09-28 2017-02-28 Faurecia Emissions Control Technologies, Usa, Llc Exhaust system mixer with impactor
WO2014051605A1 (en) * 2012-09-28 2014-04-03 Faurecia Emissions Control Technologies Exhaust system mixer with impactor
US20150361853A1 (en) * 2013-01-25 2015-12-17 Futaba Industrial Co., Ltd. Exhaust gas purification device
US9707525B2 (en) 2013-02-15 2017-07-18 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US9995193B2 (en) * 2013-07-25 2018-06-12 Faurecia Emissions Control Technologies Usa, Llc Mixer with swirl box for a vehicle exhaust system
US20160138454A1 (en) * 2013-07-25 2016-05-19 Faurecia Emissions Control Technologies, Usa, Llc Mixer with swirl box for a vehicle exhaust system
US20150152766A1 (en) * 2013-12-03 2015-06-04 Faurecia Systemes D'echappement Injection device for a reducing agent and corresponding exhaust line
US9506386B2 (en) * 2013-12-03 2016-11-29 Faurecia Systemes D'echappement Injection device for a reducing agent and corresponding exhaust line
US10030562B2 (en) 2014-01-31 2018-07-24 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US9528415B2 (en) 2014-01-31 2016-12-27 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment
US20140286832A1 (en) * 2014-06-06 2014-09-25 Caterpillar Inc. Exhaust system
US9714598B2 (en) * 2015-04-30 2017-07-25 Faurecia Emissions Control Technologies, Usa, Llc Mixer with integrated doser cone
US20160319724A1 (en) * 2015-04-30 2016-11-03 Faurecia Emissions Control Technologies, Usa, Llc Mixer with integrated doser cone
US9726064B2 (en) 2015-04-30 2017-08-08 Faurecia Emissions Control Technologies, Usa, Llc Mixer for use in a vehicle exhaust system
US9616396B2 (en) 2015-05-11 2017-04-11 Cummins Emission Solutions, Inc. Mixing assembly for reducing exhaust reductant deposits
US10245564B2 (en) 2017-07-14 2019-04-02 Donaldson Company, Inc. Dosing and mixing arrangement for use in exhaust aftertreatment

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KR20060127926A (en) 2006-12-13
DE502004011491D1 (en) 2010-09-16
US20070163241A1 (en) 2007-07-19
EP1714011B1 (en) 2010-08-04
WO2005073524A1 (en) 2005-08-11
DE102004004738A1 (en) 2005-08-18
EP1714011A1 (en) 2006-10-25

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